Soft light, white noise, alcohol and tobacco in moderation.
I have no ritual objects. If it's reasonably quiet, free of distractions, that's good enough.
A comfy chair. A highlighter. Paper in the printer (just in case) and a beverage. I would like to say peace and quiet, but that just doesn't work for me. I like to hear a little background noise, it keeps me in the moment. If I had utter peace and quiet I might completely get lost in my work and forget to feed my family!
I just need to be comfortable. Nothing special. Luckily for me I can write anywhere - office, at home, play ground, loud music etc. Once I begin writing, my immediate environment does not count because I am totally absorbed in the environment I am writing. But atimes my physical environment makes me think and be creative. I dont like writing in a quiet place because I get distracted by the slightest interruption.
I keep the news on. Different sources are examined, because our news agencies seem to have their own agendas. This seems to fuel my desire to get the truth out. I spend at least an hour a day getting my information from the internet. I then will follow up by investigating the truth behind a story and do not take at face value what our mainstream press reports and often doesn't report.
Classical music or French love songs for romantic scenes.
Reference books and classical music and jazz and folk music, lots of paper, pencils and pens.
I have to work out every day, swim, walk, any outdoor activity is necessary to keep my organizational skills clear.
I have a comfortable home office. My computer credenza is loaded with ceramic Eagles (I'm very patriotic), Police memorabilla, photos of my German Shepherds, and lots of books by my favorite authors (of which I have read each one).
Other books, articles, past writings, notes, and write best when near a natural environment where I can relax.
I had a plaque that read: "Do NOT straighten out the mess upon my desk, or you'll screw up my system." The concentration I have doesn't come with what surrounds me, but comes from within, and the burning desire to let it out for others to see and perhaps learn or be touched by it.
I'm a collage queen. If I'm working on a certain book, I paste up tons of inspirational pictures on my wall. Usually house palns, pictures of the house, the characters, etc...
Books and paintings. I also find that access to my own earlier poetic works can focus my mind.